I need to have a Watermark option on the backend to set this option when a product (item) is "sold out".I have some code that makes the WaterMark but i need a button on the admin panel on the article image , like a checkbox for example, to "Sould out", appear only on a particular product.My difficulty is on how to make a plugin to do that, i already saw the example plugin, and saw the code, it´s similar to joomla, but i´m not a programmer and so it is a litle bit hard to understand how yo make a checkbox for that.Can someone help me. It is too much to ask for a code that do that, but if someone haves it, i apreciate it. Or if someone haves  some documentation for that, it would help too,Thanks 

Uhm .. Please check my jGallery than you can see i have used my own library to resize image.
But not about that , check my library you can also see that allowed to merge image with image and display on web.
You can try to use it.
For easy way, please try to use JOOframework that included all need libraries

Hi,

I agree with you
If such a feature would be very nice